There is one Gospel: The Good News of Jesus Christ

But even if we, or an angel from heaven, were to be a preacher to you of good news other than that which we have given you, let there be a curse on him.
Galatians 1:8

The first ministry of the good news of Jesus Christ

The first words of the good news of Jesus Christ, the Son of God.
Mark 1:1

Witnessing of Jesus who had died, but is alive

Instead, they had several arguments with him about their own religion and about a certain Jesus who had died but whom Paul kept claiming was alive.
Acts 25:19

1)Rev 1:18 And I was dead, and see, I am living for ever, and I have the keys of death and of Hell.

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1.Rev 1:18 And I was dead, and see, I am living for ever, and I have the keys of death and of Hell.